1. Manuals
  2. Brands
  3. Sunny Boy Manuals
  4. Inverter
  5. 700U
  6. Installation manual

Sunny Boy 700U Installation Manual

Photovoltaic, grid-tied string inverter
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
Sunny Boy 700U
Photovoltaic, Grid-Tied
String Inverter

Installation Guide

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the 700U and is the answer not in the manual?

Questions and answers

Related Manuals for Sunny Boy 700U

Summary of Contents for Sunny Boy 700U

  • Page 1: Installation Guide

    Sunny Boy 700U Photovoltaic, Grid-Tied String Inverter Installation Guide...

  • Page 3: Revision History

    Installation Guide Copyright © 2003 SMA America, Inc. All rights reserved. No part of this document may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photographic, magnetic, or otherwise, without the prior written permission of SMA America, Inc. SMA America makes no representations, express or implied, with respect to this documentation or any of the equipment and/or software it may describe, including (with no limitation) any implied warranties of utility, merchantability, or fitness for...

  • Page 4: Safety And Hazard Symbols

    Sunny Boy. To reduce the risk of personal injury and to ensure the safe installation and operation of the Sunny Boy, you must carefully read and follow all instructions, cautions, and warnings in this Installation Guide.

  • Page 5: Cautions And Warnings

    Completely cover the surface of all PV-arrays with opaque (dark) material before wiring them. The Sunny Boy has a heat sink on its top surface to help cool the internal components. This heat sink can reach temperatures as high as 158° F (70° C). To avoid the risk of burns, never touch the Sunny Boy’s heat sink while the...

  • Page 6: Other Symbols

    Warranty All Sunny Boy inverters sold in the USA have a five-year warranty, as indicated on the warranty card included in the Sunny Boy shipping container. For warranty coverage, or if you have questions about the Sunny Boy warranty, contact SMA America at the address, telephone number, or Web site listed on page i (to send E-mail, see the Contact section of the SMA America Web site).

  • Page 7: Table Of Contents

    Sunny Boy 700U Internal Components ....4-2 Opening the Sunny Boy 700U ....4-2 Locating Internal Components .
  • Page 8 Status Messages on the Display....6-13 Troubleshooting SMA America SB700U-11:SE1104...

  • Page 9: Introduction

    Product Overview The SMA Sunny Boy 700U string inverter is designed for use in grid-tied PV generating plants. It accepts DC voltage inputs from PV arrays in one of three optional voltage ranges: 125-250 V DC, 100-200 V DC, and 75-150 V DC (an internal jumper must be set for the appropriate voltage range).

  • Page 10: Installation Overview

    Section 2: Unpacking and Inspection This section provides instructions and information for unpacking the Sunny Boy, inspecting it for shipping damage, and if necessary, returning a damaged Sunny Boy. Section 3: Mounting the Sunny Boy This section includes guidelines to help you select the best mounting location, cautions and warnings that you should follow to avoid injury and/or equipment damage, and step-by-step instructions for mounting a Sunny Boy 700U inverter.

  • Page 11: Unpacking And Inspection

    SMA dealer and to the shipping company that delivered the Sunny Boy. If it becomes necessary to return the Sunny Boy, use the original packaging in which the Sunny Boy was delivered.
  • Page 12 Unpacking and Inspection SMA America SB700U-11:SE1104...

  • Page 13: Mounting The Sunny Boy

    Consider the following guidelines, cautions, and warnings when choosing a mounting location for a Sunny Boy inverter: • The Sunny Boy 700U should be installed in a location where it is not exposed to direct sunlight, since the higher temperature within the unit caused by the sun can result in reduced output from the PV system.
  • Page 14 Mounting the Sunny Boy Choosing a Mounting Location CAUTION: The Sunny Boy 700U weighs 16 kg (36 lb.). En- sure that the surface on which you mount the Sunny Boy is strong enough to hold the weight. Do not mount the Sunny Boy on plasterboard (sheet-rock) or thin wood panelling.

  • Page 15: Dimensions And Recommended Clearances

    Dimensions and Recommended Clearances Dimensions and Recommended Clearances The outer dimensions of the Sunny Boy 700U are shown in Figure 3-2. The Sunny Boy must be mounted so that there is at least eight inches of clearance above the heat sink...
  • Page 16 Mounting the Sunny Boy Dimensions and Recommended Clearances Wall-Mounting Bracket Figure 3-3 Dimensions of the wall-mounting bracket SMA America SB700U-11:SE1104...

  • Page 17: Mounting Procedure

    Make sure that the wall you choose to mount the Sunny Boy on is sturdy enough to support its weight (16 kg/36 lb.) over a long period of time and that the wall is plumb.
  • Page 18 6. Carefully lift the Sunny Boy into position near the mounting bracket. The upside- down, U-shaped bracket attached to back of the Sunny Boy at the top edge fits over the top edge of the bracket so that the Sunny Boy hangs from the bracket (see #2 in Figure 3-4).

  • Page 19: Wiring And Connecting The Sunny Boy

    This section provides step-by-step procedures and other information required for wiring the Sunny Boy 700U to the PV array, the household circuits, and the utility grid. To accomplish the installation in the safest and most efficient manner, complete the steps in the order that they appear.

  • Page 20: Sunny Boy 700U Internal Components

    Opening the Sunny Boy 700U Remove the four M5 screws and lock washers that attach the cover to the Sunny Boy. Place the cover, screws, and lock washers aside where they will be out of your way while you are connecting wires and cables to the Sunny Boy.
  • Page 21 The DC input from the PV array (via the DC disconnect enclosure) and the output to the AC utility grid connect to the inverter inside the Sunny Boy’s case. These internal AC and DC wiring terminals (see Figure 4-1) accept a maximum wire size of #6 AWG.
  • Page 22 Communication Cable 1/2” AC Knockout Gland Figure 4-2 Bottom View of the Sunny Boy 700U Showing 1/2” Wiring Knockouts CAUTION: All knockouts in the Sunny Boy chassis are sized for 1/2-inch rigid conduit (EMT). DO NOT enlarge any of these holes, as this is a violation of UL requirements and voids the SMA warranty.

  • Page 23: Wiring The Ac Output

    Wiring the AC Output Wiring the AC Output This subsection provides complete, step-by-step procedures for wiring the AC output from the Sunny Boy to the dedicated circuit and the utility grid. AC Connection Requirements WARNING: All electrical installations must be done in accordance with all local electrical codes and with the National Electrical Code (NEC), ANSI/NFPA 70.

  • Page 24: Connecting The Ac Wires

    Figure 4-3 Energy Losses in Various Wire Sizes and Wire Lengths The Sunny Boy 700U is designed to feed 106 V AC to 132 V AC to the utility grid at frequencies from 59.3 Hz to 60.5 Hz. Table 4-1 lists the voltage and frequency limits for the AC connection.
  • Page 25 3. Install a ½-inch conduit fitting in the Sunny Boy’s AC wiring knockout (the knockout farthest to the right on the bottom of the Sunny Boy, as shown in Figure 4-2 on page 4-4). Fasten the fitting on the inside of the Sunny Boy with the nut supplied with the fitting.
  • Page 26 Wiring and Connecting the Sunny Boy Wiring the AC Output L1 (AC Line) wire connected to L terminal N (AC Neutral) 2 3 5 7 wire connected to N terminal PE PE PE PE Equipment ground wire connected to PE terminal...

  • Page 27: Wiring The Dc Input

    DC input from the PV array (via the DC disconnect enclosure) to the Sunny Boy. Figure 4-5 shows a simplified wiring diagram of a PV system. Figure 4-5 Simplified Electrical Wiring Diagram of a PV System...

  • Page 28: Configuring The Dc Input-Voltage Range

    Wiring the DC Input Configuring the DC Input-Voltage Range The Sunny Boy 700U is designed for a maximum DC input voltage of 250 V DC. The input voltage range can be configured to match the output of your PV array in three ranges: 125 V DC to 250 V DC (700 W max), 100 V DC to 200 V DC (600 W max), and 75 V DC to 150 V DC (400 W max).
  • Page 29 Use no jumper for 125 V DC to 250 V DC Figure 4-6 Configuring the DC Input-Voltage Range Note: The Sunny Boy 700U is shipped from the factory with the DC input-voltage range configured for 125 V DC to 250 V DC.
  • Page 30 125 V DC to 250 V DC (jumper in storage position) (same as no jumper) 100 V DC to 200 V DC 75 V DC to 150 V DC Table 4-3 Voltage Range Specifications for the Sunny Boy 700U Rated Maximum Maximum Configuration...
  • Page 31 Wiring and Connecting the Sunny Boy Wiring the DC Input Figure 4-7 Online String-Configuration Calculator at < www.sma-america.com > SB700U-11:SE1104 SMA America 4-13...

  • Page 32: Connecting The Dc Wires

    Connecting the DC Wires WARNING: You must connect the wires that carry the DC voltage from the PV array to the Sunny Boy in the order described in the procedure on page 4-15. Deviating from this procedure could expose you to hazardous voltages that can cause serious injury and/or death if you come in contact with them.
  • Page 33 3. Install a ½-inch conduit fitting in the Sunny Boy’s DC wiring knockout. The DC knockout is the one farthest to the left on the bottom of the Sunny Boy, as shown in Figure 4-2 (page 4-4) and Figure 4-8 (page 4-16). Fasten the fitting on the inside of the Sunny Boy with the nut supplied with the fitting.
  • Page 34 5. Pull the DC wires from the DC disconnect through the conduit into the interior of the Sunny Boy. 6. Connect the positive DC wire to the terminal labeled DC+ in the Sunny Boy. 7. Connect the negative DC wire to the terminal labeled DC– in the Sunny Boy.

  • Page 35: Connecting Communication Cables

    RS-232 Communication RS-232 is a communication standard for bidirectional transmission of data between a Sunny Boy and a PC (only one Sunny Boy can be connected per RS-232 serial cable). Requirements for RS-232 Communication: • The Sunny Boy 700U must be equipped with an RS-232 Piggy-Back communication module.
  • Page 36 Boy) PC running Sunny Data RS-232 Piggy-Back communication module No jumper installed for RS-232 communication Terminal block for RS-232 communication Communication cable gland Figure 4-9 Connecting a Sunny Boy to a PC with an RS-232 Cable 4-18 SMA America SB700U-11:SE1104...

  • Page 37: Rs-485 Communication

    Sunny Boy models on the RS-485 communication bus. Requirements for RS-485 Communication: • The Sunny Boy 700U must be equipped with an RS-485 Piggy-Back communication module. • A 3 conductor cable no longer than 4000 feet (1200 meters) with a common shield, and a wire size no smaller than 24 AWG.
  • Page 38 Wiring and Connecting the Sunny Boy Connecting Communication Cables Figure 4-10 Detail of RS-485 Termination and Jumper Settings RS-485 Pinouts 2 - A (+) (Data+) 7 - B (-) (Data-) 5 - SR (Signal Ref.) 4-20 SMA America SB700U-11:SE1104...

  • Page 39: Replacing The Cover

    3. Check the seal on the inside of the cover to ensure it is undamaged and in the correct position. 4. Carefully position the cover on the front of the Sunny Boy so that the four holes in the cover are aligned correctly with the four threaded holes in the case.
  • Page 40 Wiring and Connecting the Sunny Boy Connecting Communication Cables Note: Be sure when reinstalling the four screws that the lock washers are installed correctly. The teeth of the washers should face the LID. 5. While holding the cover in place, carefully insert the four screws with lock washers through the holes in the cover into the threaded holes in the case and turn them in until they are finger-tight.

  • Page 41: Commissioning The Sunny Boy

    Sunny Boy and void the warranty. All Sunny Boy inverters have a sophisticated system for detecting ground faults in the PV-array wiring as required by NEC Section 690.5 for PV systems installed on the roofs of dwellings.
  • Page 42 Sunny Boy’s case (see Figure 4-2 on page 4-4). To remove it, unscrew it from the holder. 2. Connect the grid voltage to the Sunny Boy by turning ON the main 120 V AC circuit breaker in the main utility breaker box.
  • Page 43 5. Open the DC disconnect in the DC disconnect enclosure, and wait until all of the LEDs on the Sunny Boy have gone off (this should take no more than five minutes). 6. Reinsert the GFDI fuse into the fuse holder on the bottom of the Sunny Boy.
  • Page 44 Commissioning the Sunny Boy Figure 5-1 Commissioning Flowchart for the Sunny Boy 700U If the Sunny Boy is not operating as expected after the commissioning procedure is complete, refer to Section 6: “Displays and Messages.” SMA America SB700U-11:SE1104...
  • Page 45 Sunny Boy automatically starts to feed AC power to the household circuits and the grid. Note: The Sunny Boy operates from the power produced by the PV array and is designed for minimal internal DC-power consumption.
  • Page 46 Commissioning the Sunny Boy SMA America SB700U-11:SE1104...

  • Page 47: Displays And Messages

    Section 6: Displays and Messages Each Sunny Boy inverter comes equipped with a three LED status indicator. This allows the user to determine the operating mode of the inverter at a glance. The basic definitions of the indicator lights are as follows: The green LED indicates that the inverter is operating and in which mode.
  • Page 48 Displays and Messages Figure 6-1 The Sunny Boy LED Status Indicator SMA America SB700U-11:SE1104...
  • Page 49 Displays and Messages Operation Indicators Standby (Night) The inverter is in standby mode because the input voltage is too low for operation. Initialization The inverter is initializing. The power from the array is sufficient to operate the control, but not yet powerful enough to begin feeding the grid. Data transmission is not possible during initialization.
  • Page 50 Displays and Messages Stopped The inverter has stopped operating while there is sufficient power available to calibrate its internal systems. Typically, the calibration lasts less than 10 seconds and then the inverter resumes normal operation. This status can also be adjusted manually (operating mode „Stop“) Waiting The inverter has determined that there is enough power from the array to operate and is checking the condition of the grid in preparation to connect to it.
  • Page 51 Normal Operation The inverter is feeding the utility grid in either “MPP” or “Constant Voltage” mode. “MPP” Mode: The Sunny Boy adjusts the voltage from the PV array to match the voltage with the highest output power. “Constant Voltage” Mode: The voltage from the PV array has been set to a fixed value.

  • Page 52: Fault Indicators

    Displays and Messages Fault Indicators Ground Fault The inverter has detected a ground fault in the PV system and has disconnected from the grid. The ground fault must be located and cleared and the inverter reset manually. (The inverter will not restart automatically) Defective GFDI Fuse The GFDI fuse located in the fuse holder on the bottom of the inverter is defective.
  • Page 53 Consistent Fault The yellow LED remains lit. The Sunny Boy has detected a fault with the internal utility monitoring system. When the inverter detects a fault of this kind it will no longer connect to the utility grid. To correct this, the inverter must be serviced by a qualified service technician.
  • Page 54 • Significant change in grid frequency Check the condition of the grid by varifying service to other customers or to other equipment. Also inspect the AC disconnect between the Sunny Boy and the grid. CAUTION: Have the grid connection to the Sunny Boy checked only by a qualified electrician.
  • Page 55 If this condition occurrs often, the actual grid impedance can be checked using the Sunny Boy Control or Sunny Data. High grid impedance can often be avoided or corrected by increasing the diameter of the AC cables between the grid connection and the inverter.
  • Page 56 The code is repeated 3 times. If the condition remains the code will continue to be sent. The inverter has detected an input voltage that is too high for safe operation. WARNING: Disconnect the PV array from the Sunny Boy immediately! High input voltage can permanently damage the inverter.
  • Page 57 The code is repeated 3 times. If the condition remains the code will continue to be sent. The inverter has encountered a condition that makes it impossible to return to normal operation and will most likely require servicing. CAUTION: The Sunny Boy must be serviced only by a qualified technician. SB700U-11:SE1104...

  • Page 58: Communication Options

    Data Transmission Data that is monitored and collected by the Sunny Boy can be easily transmitted to a remote control unit or PC. This can be accomplished in one of three ways: Powerline: Data is sent using the electrical wiring in the building as transmission lines.

  • Page 59: Sma America

    Displays and Messages Status Messages on the Display The Sunny Boy 700U is optionally equipped with the „Sunny Display“ LCD in the lid. E-today 3.86kWh Mode E-today 3.86kWh Betrieb Mode Operation Erdschluss Earth Fault Photovoltaik-Stringwechselrichter Störung Photovoltaic string inverter Failure k-Stringwechselrichter Stö...
  • Page 60 Displays and Messages Messages of the Sunny Display During Operation The Sunny Display presents all relevant operating data one screen after the other. The images on the side indicate the messages. Each message is displayed for 5 seconds, after all messages have been displayed the display starts from the beginning again.
  • Page 61 "Measuring Channels and Messages" (page 6-18). Error „Error ROM“ indicates that the Sunny Boy has detected a defective firmware in the EEPROM. Contact SMA in order to remove this failure. Indication of defective fimware...
  • Page 62 Displays and Messages Indication of DC Overvaltage !PV-Overvoltage! A too high voltage on the input (DC) side is indicated with !DISCONNECT DC ! a blinking background illumination and the display shown on the side. Indication of an overvoltage on one of the DC input connectors WARNING: Disconnect the inverter from the supply voltage immediately, otherwise it can be severely damaged.
  • Page 63 Displays and Messages Sunny Display Language Selection The Sunny Display option has the ability to display information in any of four different languages. Setting the language is performed by using a pair of slide switches located along the bottom edge of the display PC board. The language choices are: Spanish, English, French and German.
  • Page 64 DC voltage has been applied to the Sunny Boy and the Sunny Boy has been active including the time it was not able to feed to the utility with respect to too low voltage or operation in stop mode.
  • Page 65 PV voltage is determined and set MPP: Sunny Boy is in MPP mode V-Const: Sunny Boy is in constant voltage mode Derating: reduction of the grid feeding power Disturbance: A condition is only considered a Disturbance for as long as the reasons for this condition still are present.
  • Page 66 Displays and Messages Error messages In case of an error, the Sunny Boy 700U generates the error code according to the operating mode and the detected error. Error Code Description Vac-Bfr The AC grid voltage is exceeding the permissible range. („Bfr“ or „Srr“...
  • Page 67 („Bfr“ or „Srr“ is an internal message and is not important for the user.) The Sunny Boy assumes that the public grid is down and disconnects from the grid in order to avoid islanding. If you therefore often observe „dZac-Bfr“ or „dZac-Srr“ consult the utility company and ask, if it is permissable to change the grid monitoring pa- rameters of the inverter.
  • Page 68 • Void the warranty of the Sunny Boy • Void any utility interconnection agreement Never change the operating parameters without explicit permission and instructions! Table 6-1 Operating Parameters of the Sunny Boy 700U; 75 - 150 V DC (changeable) Name Unit Range...
  • Page 69 The parameters concerning anti-islanding can only be changed after entering the installers password here. The following parameters appear in parameter list but connot be modified: Table 6-2 Operating Parameters of the Sunny Boy 700U; 75 - 150 V DC (fixed) Name Unit Range...
  • Page 70 Displays and Messages Table 6-3 Operating Parameters of the Sunny Boy 700U; 100 - 200 V DC (changeable) Name Unit Range Default Description E-Total 0 ... 200000 Total energy yield (E_Total) and total operating E-total hours (h_Total) of the inverter. Changing the value...
  • Page 71 Displays and Messages The following parameters appear in parameter list but connot be modified: Table 6-4 Operating Parameters of the Sunny Boy 700U; 100 ... 200 V DC (fixed) Name Unit Range Default Description Plimit Upper limit of AC output power...
  • Page 72 Displays and Messages Table 6-5 Operating Parameters of the Sunny Boy 700U; 125 - 250 V DC (changeable) Name Unit Range Default Description E-Total 0 ... 200000 Total energy yield (E_Total) and total operating E-total hours (h_Total) of the inverter. Changing the value...
  • Page 73 Displays and Messages The following parameters appear in parameter list but connot be modified: Operating Parameters of the Sunny Boy 700U; 125 ... 250 V DC (fixed) Name Unit Range Default Description Plimit Upper limit of AC output power SMA-SN...
  • Page 74 Displays and Messages 6-28 SMA America SB700U-11:SE1104...

  • Page 75: Troubleshooting

    • Check the blinking code on the lid of the Sunny Boy and compare the code with the blinking codes in chapter 6.
  • Page 76 • Open circuit voltage (Voc) of the module • Number of modules in each string If it becomes necessary to send the Sunny Boy back to the manufacturer for service, please ship it in the original box to avoid damage during shipping.
  • Page 77 Troubleshooting FCC Compliance Information Sunny Boy Utility Interactive Inverter, Model SB700U This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
  • Page 78 Troubleshooting SMA America SB700U-11:SE1104...
  • Page 79 Sunny Boy SB700U Specifications SUNNY BOY 700U INVERTER BREAKER SIZE 1p 10 Amp Inverter Technology Real sine-wave, current source, high frequency PVM AC Input Voltage 106 - 132 (120 V) 59.3 - 60.5 (60 Hz) AC Input Frequency Peak Power Tracking Voltage...

Table of Contents